I always thought that the harpsichord in popular music sounded pretty terrible.
I was born in 1971.
Perhaps I am a product of the times?
Also, I wonder what accounts for the steep drop in harpsichord sales from 1966 to 1970? Maybe Judy Collins' surge in popularity in the early '70s made people wake up to the incorrect usage of this instrument?
Anyway - this is gibberish. Read the great comments here, where I took this infographic.